Does anyone have one of these on a Grizzly 660, and are they worth a crap? Any help would be appreciated. Its one of those things I might buy if somebody convinced me of it, but wouldn't take a chance on without some firsthand knowledge to back it up.

 

Bueller?? Bueller?? Frye?? Frye?? Anyone?? Anyone??

 

5 months later, anyone?

 

I haven't used one on my Grizz, but have ridden a couple with it. Unless you have the basic mods first, the CDI probably won't be an improvement. If the basic mods are already done (airbox, pipe and jet kit), then the Dynatech CDI is the one to get.
Don't buy Procom, they seem to have alot of issues on the Grizzly.

 

have never done anything to the airbox, but I rejetted and put an HMF on it about 5-6 years ago.